1311020111323 has 16 divisors (see below), whose sum is σ = 1457813625856. Its totient is φ = 1170811804320.

The previous prime is 1311020111321. The next prime is 1311020111341. The reversal of 1311020111323 is 3231110201131.

It is not a de Polignac number, because 1311020111323 - 2¹ = 1311020111321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311020111323.

It is not an unprimeable number, because it can be changed into a prime (1311020111321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1021636 + ... + 1914622.

It is an arithmetic number, because the mean of its divisors is an integer number (91113351616).

Almost surely, 2^{1311020111323} is an apocalyptic number.

1311020111323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1311020111323 is a deficient number, since it is larger than the sum of its proper divisors (146793514533).

1311020111323 is a wasteful number, since it uses less digits than its factorization.

1311020111323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896674.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1311020111323 its reverse (3231110201131), we get a palindrome (4542130312454).

The spelling of 1311020111323 in words is "one trillion, three hundred eleven billion, twenty million, one hundred eleven thousand, three hundred twenty-three".